Prep your pan: Line a mini muffin pan with paper liners, or line a small square dish (about 8x8 inches) with parchment paper.
This keeps the bites from sticking and makes cleanup simple.
Melt the base: In a heatproof bowl, combine peanut butter, coconut oil, and chopped sugar-free chocolate. Microwave in 20–30 second bursts, stirring between each, until smooth and glossy. Alternatively, melt over a double boiler on the stove.
Sweeten and season: Whisk in the powdered sweetener, vanilla, and salt.
Taste and adjust sweetness. Remember it will taste slightly less sweet once chilled.
Add the crunch: Fold in shredded coconut, chopped peanuts, and cacao nibs if using. If you’re adding flaxseed or chia, sprinkle it in now and stir until evenly combined.
Portion: Spoon the mixture into the lined mini muffin pan, filling each cup about three-quarters full.
If using a pan, spread the mixture in an even layer and press lightly with a spatula.
Chill: Refrigerate for 45–60 minutes, or until firm. For faster results, freeze for 20–25 minutes. They should pop out cleanly once set.
Serve: Enjoy straight from the fridge for the best texture and snap.
If using a pan, lift the slab by the parchment and cut into bite-size squares.